Google Ads Bid Adjustments Explained (and When They’re Ignored)
How device, location, schedule and audience adjustments change your bids, how they stack, and why Smart Bidding quietly ignores most of them.
A bid adjustment raises or lowers your bid by a percentage in a specific context — device, location, ad schedule or audience. Multiple adjustments multiply together, so a 20 rupee bid at +20% and +10% becomes 26.40 rupees. The catch: under Smart Bidding, your manual bid adjustments are bypassed because the AI already sets bids in real time — the main exception being a device adjustment of -100% to exclude a device.
Bid adjustments nudge your bids up or down by context
A bid adjustment is a percentage that raises or lowers your bid in a specific situation — for example, bidding 20% more on mobile, or 30% less after office hours. They let you push harder where conversions are likely and pull back where they’re not.
The main types are device, location, ad schedule (day and time) and audience. Each can range from -100% (don’t bid here at all) upward.
Bid adjustment calculator
Bid adjustments stack multiplicatively. Enter a base bid and up to two adjustments to see your effective bid. (Use negative values for downward adjustments.)
Multiple adjustments multiply together
When more than one adjustment applies to the same auction, they don’t add — they multiply. A ₹20 base bid with a +20% device adjustment and a +10% location adjustment becomes:
That compounding is easy to underestimate, which is why the calculator above is handy — a few “small” adjustments can move your real bid a long way.
Most adjustments are ignored under automated bidding
This is the part that trips people up. With Smart Bidding (Target CPA, Target ROAS, Maximize Conversion Value), Google already sets the optimal bid for each auction in real time using device, location and far more — so it bypasses your manual bid adjustments. You can leave old adjustments in place; they simply won’t apply.
The one meaningful exception is a device adjustment of -100%, which still works to fully exclude a device. Bid adjustments do apply when you bid manually.
- Bid adjustments raise or lower your bid by a percentage for a given context.
- The main types are device, location, ad schedule and audience.
- Multiple adjustments multiply together, so small ones compound quickly.
- Under Smart Bidding, manual bid adjustments are bypassed by the AI.
- The key exception is a device adjustment of -100% to exclude a device entirely.
Bid adjustment FAQs
What are bid adjustments in Google Ads?
How do bid adjustments stack?
Do bid adjustments work with Smart Bidding?
What types of bid adjustments are there?
How do I exclude a device in Google Ads?
When should I use bid adjustments?
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